Nut-lock.



'No' 825,233. 'PATENTED JULY 3. 1906.

B. MOORE.

NUT LOCK. APPLIOATION FILED 1330.20, 1.905.

I RGGGSSBS OI grooves p whichi UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented July 3, 1906.

Application filed December 20,1905. Serial No. 292.608-

provision of a nut lock comprehending a washer to be inserted between the nut and retaming-surface, the washer-face and con: tiguous nut-face to be formed with registering recesses to receive a split key to lock the washer and nut together.

The invention in detail will be described in the following specification with particular reference to the accompanying drawings, in

Figure 1 is a sectional view illustrating the application of my im roved nut-lock, the b0 t being shown in e evation. Fig. 2 is a view in elevation with the key in section, illustrating thelocking o eration of the key. Fig. 3 is a face plan of tlie nut. Fig. 4 is a bottom plan of the washer. Fig. 5 is a face plan of the washer. Fig. 6 is an elevation of the key.

Referring to the drawin s, wherein like reference-numerals indicate ike parts through out the several views, 1 represents a bolt of any desired construction, arranged to be passed through any suitable fixture 2.

3 represents a washer, preferably circular in lan and formed with a central opening 4 to oosely engage the bolt 1." On its rear surface, or that surface next the fixture 2, the

washer is formed or provided with a plurality of spurs 5, arranged to be driven into the material of the fixture to prevent independent revolution of the washer on the bolt. On its face the washer isformed witha horizontallyarranged recess 6, concentric with the boltopening 4, the inner edge of this recess ter-. minating at the edge of the bolt-opening. 7 radiate from the recess 6, being in communication with the latter at their inner ends and terminatin at the periphery of the washer, as clear y shown in Fig. 5. This construction provides a recess concentric with the bolt-o ening and in com .munication with the perip cry of the washer by a series of radially-projecting and regulary-spaced grooves.

The nut is of usual form, being formed with the ordinary threaded bolt-receivingv vopening 8. A recessg, similar in dimensions to the recess 6 in the washer, is arranged concentric with the bolt-opening 8. A series of radially-projecting rooves 10 communicate with the recess 9 and extend therefrom to the edges of the nut, as clearly shown in Fig. 3.

The recesses and grooves in both the washer and nut are preferably about semicylindrical in section, so that when these recesses and grooves in the respective parts are arranged to register a practically circular opening is formed between the meeting edges 0 the washer and nut. It is to be also noted that the terminals of the grooves 7 and 10 in the washer and nut, respectively, have flared or divergent walls, so that the entrance to the o ening formed by the registering grooves of t 1e nut and washer when assembled is shaped to exert a clamping or bindin action on the key, and thereby materially ai in preventing accidental displacement of the key.

In practice the washer is passed over the bolt, with its spurs seating in the fixture, after which the-nut is screwed. down tightly onto the washer, being arranged so that one of its grooves 10 registers with one of the grooves 7 of the washer. A split key 11 is now in serted in the openin formed by the registering grooves, bein driven therein until the terminals of the l qey contact with the bolt. This contact separates the terminals, and on a further movement of the key said terminals will spread and ride in the registering recesses 6 and 9 of the washer and nut. The key is practically circular in section, with its terminals formed longitudinally and vertically thereof, so that half of each terminal is held in the res ective groove and recess of the washer, an the other half of the key-terminal is held in the registering groove and recess of the nut. The nut is thus held a ainst independent movement on the bolt, being locked to the washer through the medium of the key as described.

In the event the fixture 2 is of wood the washer is preferably formed withv a plurality of spurs 5, which may be driven directly into the wood; but in the event such. fixture should be of metal the washer will be provided with a sin 'le spur and a suitable opening tapped into Flle fixture to 2'"'ceive the spur,

as the sole function of the spur is to prevent independent turning of the washer.

The construction described is simple and efficient in use, but a single key being re quired to securely lock the parts to ether.

By preference the washer is slight y reater in diameter than the nut, so that t e key may be driven completely home and yet proj ect slightly beyond the plane of the nut, whereby to prevent convenient operation of a suitable tool for withdrawing the key.

The nut, though shown square in plan, may be any shape desired, and the grooves 7 in the washer and the grooves 10 in the nut may be in any number necessary.

Havin thus described the invention, what is claime as new is- 1'. A nut-lock comprising a washer arranged to slidably engage the bolt and formed on its face with a recess concentric with the bolt-opening and with a plurality of grooves opening through the edge of the washer and in communication with the recess, a nut provided with a recess concentric with the bolto kppning and with radiating grooves opening t ough the edge or" the nut and communicating with said recess, the recesses of the washer and nut and one of the grooves in each is arranged to respectively re ister, the entrance} opening of said grooves eing flared to pro-.

vide when said grooves are in register a conthe converging'entrance, whereby to clamp the key against accidental withdrawal.

2,. nut-lock comprising a washer formed with a recess and with a radiating groove communicating therewith, a nut formed with T a similar groove and recess, the grooves-and recesses being arrangedto respectively register, the side walls of the outer ends of each 1 groove diver ing toward said end, and a split ey arranged to be seated in the-registering grooves with its terminals spread into the istering recesses, said hey being held in re pti sition by the clamping engagement of the members thereof with the diverging walls of the grooves. v

In testimony whereof I affix my signature in presence of two witnesses.

BENTQN MOORE. Witnesses J. W. HoLnREN, L. P. BROOKS. 

